Tool-rest for grinding-machines.



C. A. & A. A. ANDERSON. TOOL BEST FOR GRINDING MACHINES.

APPLICATION FILED MAR. 6. I916.

Patented Dec. 5, 1916.

3 SHEETS-SHEET l.

ow, Puowuma. WASHINGTON, n. c

C. A. & A. A. ANDERSON.

TOOL REST FOR GRINDING MACHINES.

APPLICATION FILED MAR. 6. 1916.

1,206,791. Patented Dec. 5,1916. v

3 SHEETS-SHEET 2.

IIIIIINIIIIIIIHIIHI qfifl-z C. A. & A. A. ANDERSON.

TOOL BEST FOR GRINDING MACHINES.

APPLICATION FILED MAR. 6.1916.

1,206,791. Patented Dec. 5, 1916.

3 SHEETS-SHEET a.

IOHJYIIINDH WASHINGm/v, a. c

" N 13E STATES F orrren CARL A. annnnson AND ANDREW A. Annnnson, or woRoEsTEn, MASSACHUSETTS.

TOOL-REST FOR GRINDING-MACHINES.

Specification of Letters Patent.

Patented Dec. 5, 1916.

Application filed March 6, 1916. Serial No. 82,455.

To all whom it may concern:

Be it known that we, CARL A. ANDERSON and ANDREW A. ANDERSON, citizens of the United States of America, residing at Worcester, in the county of lVorcesterand State of Massachusetts, have invented certain new and useful Improvements in Tool- Rests for GrindingMachines, of which the following is a specification, reference being hadtherein to the accompanying drawing.

This invention relates to tool rests for grinding machines and has for its principal object the production of a simple and elficient means for obtaining a very accurate adjustment for the supporting element of the tool which is being sharpened so that the tool may be brought into engagement with the emery stone in any position desired owing to the edge which may be desired upon the tool.

Another object of this invention is the production of, tool rests for grinding machines wherein the tables employed are mounted so as to permit their elevation to be changed independent of their supports, while their supports are also capable of being swung, whereby various angles may be assumed by the tables so that the tools positioned thereon may have their edges brought into engagement with and easily ground by the emery stones so as to form an edge of a desired shape upon the tool which is being sharpened.

Another object of this invention is the production of a tool rest for grinding machines wherein the tool rests are pivotally supported upon a supporting bar, while the table of each tool rest is pivotally mounted upon a rod carried by the frames, so that two adjustments may be obtained for each tool rest, as there is means provided for releasably retaining the tables in set positions, thereby, permitting the tool to bebrought into engagement with the emery wheel at any angle desired.

With these and other, objects in view this invention consists of certain novel combinations, constructions, and arrangements of parts as will be hereinafter fully described and claimed. In the accompanying drawings: Figure 1 is a front elevation of the tool rest for a grinding machine, showing the complete'ldevice, and illustrating the manner in which the same is used; Fig. 2 is a top plan view of the tool. reSt for grinding machines. Fig.

3 is a vertical section taken on the line 33 of Fig. 1, looking in the direction of the arrow. Fig. 4C is a front elevation of one of the. tool rests, illustrating the manner in which the detachable elongated tool rest is carried upon the table. Fig. 5 is a section taken on the line 55 of- Fig. 3. Fig. 6 is a section taken on the line 6-6 of Fig. 1, showing the-tool clamp in section mounted upon the table. Fig. 7 is a section taken on the line 77 of Fig. 1. Fig. 8 is a section taken on the line 88 of Fig. 4:. Fig. 9 is a section taken on the line 9-9 of Fig. at. Fig. 10 is a section taken on the line 1010 of Fig. 2. Fig. ,11 is a sectional view, partly in elevation, illustrating the manner in which the worm gear is supported upon one of the frames of one of the tool rests. Fig. 12 is a horizontal section taken on the line 1212 of Fig. 1. Fig. 13 is'a perspective view, partly broken away, of the side of a detachable tool rest, used in connection with this 1nvention. Fig. 14 is a top plan view of a detachable tool clamp to be mounted upon one of the tables.

I Referring tothe accompanying drawings by numerals it will be seen that 1 designates a hollow casing which is adapted to be carried upon any suitable support or machine support 2. This casing 1 has a rotating shaft 3 carried by its upper portions upon which the'pulleys a are keyed, while adjacent its ends there are carried the emery wheels 5 within. the hoods 6. Any suitable source of motor power may be applied to the pulleys 4 so that as the pulleys a rotate rotary motion will be imparted to the emery wheels 5, as the shaft 3 is rotated.

It is not deemed necessary to deal more specifically with the construction of. the grinding 'machine per se inasmuch as the inventiondeals more particularly with the tool rests which are adapted to hold the tools which are being mounted in position to be engaged by the emery stones The integral supporting lugs 7 are formed upon the'forward ends of the casing 1 in parallel spaced relation as disclosed most clearly inFigs. 1 and 2. The, bar 8 passes through these lugs? and-is held against ro 'tationand retained in a set position by means of the set screws 9 which are carried by the lugs 7 and engage the'bar 8. This bar 8 exte ds for a considerable distance be- 7 extending for yond'the side surface of the lugs 7 and beyond the ends of the casing 1 so as to ex tend toa point in alinement with the emery stones 5. Each tool rest comprises a frame which consists of a split sleeve 10 having depending flanges 11 formed upon its lower portions through which extend the screws 12 of the grip 13. Thus, itfwill be seen that as the grip 13 is swung in one directionit will draw the flanges 11 toward each other, thus causing the sleeve 10 to bind upon the bar 8 and thus hold the frame in a set position. From the extreme end of the frame there extend the integral fingers 14k which diverge toward their upper ends and which have'the collars 15 formed integral thereon upon their upper ends. The short rod 16 is carried by the collars 15 of each frame and is held in a fixed engagement therewith by means of the set screws 17 which pass through these collars and into a binding engagement w th the rod 16.

prises; an elong. ted plate upon ts upper sur- 7 One of the tables 17 comface which has a depending lug 18 formed upon one end thereof, which is pivotally or rotatably mounted upon the inner projecting end of one of the rods 16. The split lug 19 is formed integral upon the table 17 adjacent its opposite end and has its split ends a distance belowthe rod 16. The screw 20 of the grip 21 passes through the lower ends of this split lug 19 so that upon rotatingin one direction the split lug will be drawntogether so as to bind positively and firmly upon one rod 16, thus holding the table 17 in an adjusted set position. It will be seen that if it is desired to obtain avery sharp edge upon the tool which is to be sharpened the grip'21 may be rotated so as to cause the split lug torelease this binding action. The table. 17 may then be swung upwardly at its forward edge or the edge which 13 ad acent the emery wheel or 7 stone 5, and then the grip 21 may be rotated so as to tighten the split lug upon the rod 16. The grip 13 of this particular frame may then be rotated so asto cause the sleeve to release its binding action upon the bar 8 and then the frame may be swung toward the emery wheel so as to allow the inner edge of the table 17 to be positioned adjacent the "emery wheel and at an elevated plane, after which the grip 13 may 'bind the sleeve upon the bar. The tool may then be positioned upon the table and because of the angle at which the table extends, such for instance as a plane of approximately 15, the edge formed upon the 'tool willibe similar to the edge formed upon 'achisel or plane. 'If it is desired to form an edge upon some'instrument such for instance as a scissors the grip .13 berotated so as to cause'a binding action of the sleeve 10 upon theibar toibe released, at. which time the frame may be swung awayfrom the emery'wiheel t0 any passes.

V tegral blocks 33.

The table 22 has a journal lug 18 table 22, however, there is carried an integral' depending body 23 havinga rack 24 formed on its periphery. A curved neck 25' extends from one of the fingers 14, extending' to one side thereof, as shown in Figs. 1 and 11. This neck 25 has a sleeve 26 formed integral thereon, through which the stem 27 stem 27, while the worm gear is shrunk or secured in any other 'manner upon the opposite end of the stem 27. This neck 25 is formed upon one of the fingers li-so that The grip wheel 28 is keyed by meansof the sleeve 29 upon one end of this thus swing the table 22 to different planes 7 upon the rod 16 upon which the same is mounted. Thus, it will be seen that besides obtaining the adjustment of the sleeve 10 of this particular frame the table 22 may further be adjusted as is the case with the table 17 by means of the worm screw and grip wheel. It is, of course, obvious by referring particularly to Fig; 1 that the split lugs of the two tables are carried so as to bear against theouter side surface of the collars formed upon the fingers lt, thereby holdlng the tables from longitudinal movement 7 upon the rods under any circumstances. It will be seen that the table 22 is provided with a beveled forward face 31, while there is formed adjacent its rear edge the longitudinal upstanding rib 32. There is also formed upon the forward beveled edge i' of the table 22 a plurality of beveled in- The elongated closed in Fig. 13 comprises an elongated body 34& having the depending'lugs' 35 formed upon its lower surface, which lugs 35 have beveled inner portions 36. When this detachable rest is used it is positioned upon the upper surface of the table 22 so detachable tool rest dis- Y as toallow the lugs 35 to engage the blocks 33 of the table. There is provided upon the rear portion of this detachable rest 3st a side flange 37 having'a depending lip 38 formed thereon, which there is carried a screw 39,. When this detachable rest is positioned upon the table 22 the lugs 35 willengage the blocks 33 as above stated and since the blocks 33 and lugs 35 are beveled they will be held from having accidental upward movement. At this time the screw 39may be rotated so as to engage the beveled rear faceLO of the table 22 thus holding the detachable rest against accidental displacement. This detachable rest is comparatively long so that tools having long edges to be sharpened may be positioned thereon and may be moved therealong into engagement with one of the emery stones or wheels 5.

The clamp disclosed in Fig. 14 comprises a body 41 having the ribs 42 formed upon its lower surface so as to ride easily upon the upper surface of the tables. When used in connection with the table 22 it is obvious that it will rest against the rib 3% of this table and thus be guided evenly along the upper portions of the table 22. The machine faces 43 of the body 41 are formed at a distance below the overhanging lip 44L in which there is carried a set screw 45.

Thus, it will be seen that a tool as indicated at 46 may passbeneath the lip 44: so that the set screw 45 may be brought into engagement therewith for positively holding the tool in engagementwith the body 41. As this tool clamp is mounted upon the table 22, the table, of course, may be adjusted so as to allow the tool to be brought into engagement with the emery wheel 5 for obtaining the correct cutting edge upon the tool. As the emery wheel is rotated it will be seen that. the tool clamp 41 may move back and forth upon the upper portions of the table 22, whereby the entire cutting edge of the tool may be sharpened.

It is obvious that it is necessary to pivotallysupport the frame of each table be cause of the fact that if onlythe table were pivotally mounted when swung upwardly or downwardly at its forward edge it would be swung away from the stone to such a distance as to make it impossible for the tool to engage the same. By having the frame of eachtable mounted so as to be moved toward or away from the stone as necessary, it is obvious that when the forward edge of the table is swung upwardly the frame may be moved toward the stone so as to engage the edge of the table adjacent thereto, or when the forward edge of the table is swung downwardly the frame may be swung away from the stone for providing sufficient space to accommodate this action or movement of the table.

From the foregoing description it will be seen that very simple and eflicient tool rests for grinding machines have been provided, which can be positioned upon almost any form of grinding machine, simply by providing supporting lugs or blocks upon the casing of the machine adjacent the emery wheels upon which the frames and tables may be supported by means of a fixed bar. It is further obvious that as these frames are provided with simple means for retaining the same in set positions after being swung to a desired position and owing to the fact that simple and efiicient means has been provided whereby the tables may be adjusted independent of the movement of the frames, the tables may be moved to assume desired angles so that as the tools are positioned thereon they will extend in any desired angle for correctly engaging the emery wheels.

What is claimed is:

1. In a tool rest for grinding machines, the combination of a support, lugs carried upon said support, a bar carried by'said lugs, means for holding said bar in engagement with said lugs, said bar extending beyond said lugs, frames carried upon the projecting ends of said bar, means for holding said frames in an adjusted set position, tables adjustably mounted upon the upper portions of said frames, said frames being capable of being swung for moving said tables and said tables being capable of moving independent of said frames, whereby tions when in use.

'2. In a tool rest for grinding machines, the combination of a support, a bar carried by said support, a frame carried by said bar, said frame comprising a sleeve, said sleeve being split and having outwardly extending flanges extending from points adjacent its split portion, means'for drawing said flanges togetl'ier for binding said sleeve upon said bar, upwardly extending fingers carried by said sleeve, and a table adjustably mounted upon the upper end of said fingers, said table being capable of being moved independent of the movement of said frame, and said frame also being capable of being moved to accommodate said table for permitting the table to be swung to a desired position when in use.

3. In a tool rest for grinding machines, the combination of a support, a bar carried by said-support, a frame carried by said bar, said frame comprising a sleeve, said sleeve being split and having outwardly extending flanges extending from points adjacent its split portion, means for drawing said flanges together for binding said sleeve upon said bar, upwardly extending fingers carried by said sleeve, collars formed upon the upper ends of said fingers, a rod carried by said collars, said rod extending beyondthe side portions of said collars, a table pivotally mounted upon said bar, means for holding said table in an adjusted set position, said frame being capable of being moved in unison with said table, said table being capable said tables may be moved to desired posiof being moved independent of said frame, whereby thertable'may be moved to a desired position when in'use.

a. In a tool rest for the combination of a support, a frame adjustably mounted'upon said support, a neck carried by said frame, a stem carried by said neck, a worm gear carried upon said stem, a grip wheel carried by said stem, whereby said stem may be rotated for turning said worm gear, a table pivotally mounted upon the upper portions of said frame, a body formed upon sail table hav ing a rack formed uponits periphery, said rack engaging said worm gear vliereby as said worm gear is rotated by said grip wheel, said table may be swung to assume different positions, and said frame also being capable of being moved in unison with said table.

In a tool rest for grinding machines,

the combination of a support having lugs formed thereon, 'a'bar carried by said lugs, a split sleeve carried by said bar, means for drawing said sleeve together for binding uponsaid bar, outwardly extending fingers carried by said sleeve, a neck extending from one of said fingers, a stem carried'by said neck, a worm gear carried upon said stem, collars formed upon the upper ends of said fingers, a rod carried upon said 001- lars, a table having a depending lug carried upon one end of said rod, a body formed upon the opposite end of said table and engaging the opposite end of said rod, whereby said table will be pivotally supported, a rack formed upon the periphery of said body and engaging said worm gear, whereby said sleeve vmay be loosened so as to permit said frame to move to an adjusted position after which said sleeve may be clamped upon said Copies of this patent may grinding machines, 7

lug engaging said rod adjacent bar,after which the grip wheel will'cause said worm gear to cause, said body to move; said frame 'sosas said table independent of to cause thetable to assume a desirediposition when in use. V

6. In a tool rest for the combination of a support, lugs carriedby said support, a bar carried by said support, a split sleeve carried by said bar having grinding machines,

flanges extending therefrom, ascrew carried by said flanges for causing said sleeve to be bound upon said bar, I

fingers extending through said sleeve, colla'rs carried upon said fingers, a rod carried by said collars, means for holding said rod against accidental displacement, a table havsaid rod, a split its opposite end, and means for drawing said lug into binding engagement with said rod, whereby said table may be retained in a set position.

7. In a tool rest for grinding machines, the combination of a table, means for adjustably supporting said table, said table having beveled blocks formed upon its forward edge and having a beveled rear ec go in combination with a detachable tool rest tting thereon, said detachable rest having a lug supported upon depending lugs "formed integral thereon,

beveled faces fitting upon said lugs having a flange the beveled faces of said blocks,

formed upon said detachable rest having a depending lip, a set screw carried by said lip and engaging the beveled edge of said table, whereby said detachable rest will be held against accidental displacement.

In testimony whereof we hereunto afiix our signatures.

CARL A. ANDERSON. ANDBEVV A. ANDERSON.

be obtained for five cents each; by addressing the Commissioner of Patents,

Washington, D. C.

outwardly extending 

